Decorative rock



FIG. 1 is a perspective view of a decorative rock showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is an opposite side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

In FIGS. 1, 2, 3, 4, 5 and 6, the broken lines showing of environmentalstructure for purposes of illustrating the decorative rock in acondition of use. The broken lines and the structure they depict form nopart of the claimed design.

The ornamental design for a decorative rock, as shown and described.